Title (en)

LOW TEMPERATURE CURE HEAT-CURABLE POWDER COATING COMPOSITION COMPRISING A CRYSTALLINE POLYESTER RESIN, AN AMORPHOUS POLYESTER RESIN, A CROSSLINKING AGENT AND A THERMAL RADICAL INITIATOR

Title (de)

BEI NIEDRIGEN TEMPERATUREN WÄRMEHÄRTBARE PULVERBESCHICHTUNGSZUSAMMENSETZUNG MIT EINEM KRISTALLINEN POLYESTERHARZ, EINEM AMORPHEN POLYESTERHARZ, EINEM VERNETZUNGSMITTEL UND EINEM THERMISCHEN RADIKALEN INITIATOR

Title (fr)

COMPOSITION DE REVÊTEMENT EN POUDRE DURCISSABLE À BASSE TEMPÉRATURE COMPRENANT UNE RÉSINE DE POLYESTER CRISTALLINE, UNE RÉSINE AMORPHE, UN AGENT DE RÉTICULATION ET UN INITIATEUR RADICALAIRE THERMIQUE

Publication

EP 2566923 B1 20170104 (EN)

Application

EP 11717287 A 20110506

Priority

• EP 10162176 A 20100506
• EP 10162159 A 20100506
• EP 2011057294 W 20110506
• EP 11717287 A 20110506

Abstract (en)

[origin: WO2011138432A1] The invention relates to a heat-curable powder coating composition comprising i) at least one crystalline polyester resin present in an amount of at most 90 wt%; and ii) at least one amorphous polyester resin; and iii) at least one crosslinking agent; and iv) at least one thermal radical initiator, wherein, the at least one crystalline polyester resin and/or the at least one amorphous polyester resin has di-acid ethylenic unsaturations; wherein the at least one crosslinking agent is either crystalline or amorphous; wherein the at least one crosslinking agent has reactive unsaturations that are reactable with the ethylenic unsaturations of the di-acid ethylenic unsaturations of the at least one crystalline polyester resin and/or the at least one amorphous polyester resin to be crosslinked, said unsaturations of the crosslinking agent are different from the unsaturations of the at least one crystalline polyester resin and the unsaturations of the at least amorphous polyester resin; wherein the wt% is based on the total amount of i)+ ii)+ iii). The compositions of the invention may be cured to an acceptable degree at low temperature of for example at most 130°C for at most 20 minutes, said compositions may be ground, sieved and extrudable and said compositions can upon heat cure form powder coatings that may also exhibit a good balance of properties between good flexibility, good smoothness and good adhesion. In addition, the compositions of the invention can suitably be used on heat- and/or non heat-sensitive, even if the composition is highly pigmented.

IPC 8 full level

C08K 3/00 (2006.01); C08K 5/00 (2006.01); C08K 5/06 (2006.01); C08K 5/10 (2006.01); C08K 5/101 (2006.01); C08K 5/14 (2006.01); C08L 67/00 (2006.01); C08L 67/06 (2006.01); C09D 167/00 (2006.01); C09D 167/02 (2006.01); C09D 167/06 (2006.01)

CPC (source: EP US)

C08L 67/00 (2013.01 - EP US); C09D 167/00 (2013.01 - EP US); C09D 167/02 (2013.01 - US); C09D 167/06 (2013.01 - EP US); C08K 3/011 (2017.12 - EP US); C08K 5/0025 (2013.01 - EP US); C08K 5/06 (2013.01 - EP US); C08K 5/10 (2013.01 - EP US); C08K 5/101 (2013.01 - EP US); C08K 5/14 (2013.01 - EP US); C08L 67/06 (2013.01 - EP US)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

WO 2011138432 A1 20111110; AU 2011249733 A1 20121122; AU 2011249733 B2 20131205; BR 112012028431 A2 20190924; CN 102884132 A 20130116; CN 102884132 B 20150617; CN 104830214 A 20150812; DK 2566923 T3 20170327; EP 2566923 A1 20130313; EP 2566923 B1 20170104; ES 2620237 T3 20170628; HK 1180707 A1 20131025; HK 1213588 A1 20160708; NZ 603172 A 20130830; PL 2566923 T3 20170731; SI 2566923 T1 20170426; US 2013203938 A1 20130808; US 9296917 B2 20160329

DOCDB simple family (application)

EP 2011057294 W 20110506; AU 2011249733 A 20110506; BR 112012028431 A 20110506; CN 201180022834 A 20110506; CN 201510249525 A 20110506; DK 11717287 T 20110506; EP 11717287 A 20110506; ES 11717287 T 20110506; HK 13107801 A 20130703; HK 16101441 A 20160205; NZ 60317211 A 20110506; PL 11717287 T 20110506; SI 201131134 A 20110506; US 201113696449 A 20110506